Improving Morphological Quality and Uniformity of Hydrothermally Grown ZnO Nanowires by Surface Activation of Catalyst Layer

Table 2 Summary of the results of SEM images, AFM topographies, and CV responses

Activation process	ΔE _p (mV)	Roughness (nm)	Density (no. of NWs per 100 μm²)	Figure of merit, FoM
H₂O₂:KOH [1:2] for 10 min	122	3.53 ± 0.33	140	80,257
H₂O₂:KOH [1:3] for 10 min	102	3.36 ± 0.18	124	98,844
H₂O₂:NaOH [1:2] for 10 min	112	3.01 ± 0.36	172	140,393
2-month-old, uncleaned	–	2.87 ± 0.28	0	–
1-year-old, uncleaned	–	2.74 ± 0.34	0	–